The encounter between Voyager and Saturn's environment reveals the presence of electromagnetic ion cyclotron waves (EMIC) in the magnetosphere of Saturn. Cassini provides evidence of dynamic particle injection in Saturn's internal magnetosphere. Previous theoretical studies have suggested that EMIC waves may explain the loss of relativistic electron populations. However, recent observations indicate that although the EMIC wave is responsible for the significant loss of super-relativistic electrons, the relativistic electron population is almost unaffected. In this paper, we study the effects of EMIC waves and relativistic particles on these waves in the plasma, which propagate obliquely relative to Saturn's magnetic field. The particles are assumed to be trapped and follow ring distribution function. Using the kinetic approach, the expressions of dispersion relation and growth rate are derived. Various parameters affecting the growth of EMIC waves has been studied. The effect of drift velocity has also been studied in this case.
展开▼
